Method for manufacturing three-dimensional object

Abstract

The invention discloses a method for manufacturing a three-dimensional object. The method comprises the steps that at least one layer of all layers of a three-dimensional object to be printed is scanned in a first manner until a printing-formed three-dimensional object is obtained; and the printing-formed three-dimensional object is placed in a smelting furnace, so that powder filled into the area, included by the contour of the printing-formed three-dimensional object is melted and sintered, and then the final three-dimensional object is obtained. The first manner specifically comprises the steps that the current-layer cross-section information of the three-dimensional object to be printed is acquired; all the contour boundary lines of the current-layer cross section are identified, and at least one contour spacing parameter formed by the contour boundary lines is calculated; whether supporting lines are arranged in the contour area corresponding to the contour spacing or not is judged according to the size of the contour spacing parameter; and all the contour boundary lines and the supporting lines contained in the current-layer cross section are scanned. According to the method,the scanning workload of the supporting lines is far smaller than the workload of filling scanning, so that a large number of scanning tasks of the original filling part are greatly reduced, and theworking efficiency is improved.

Description

technical field [0001] The present application relates to the technical field of additive manufacturing, in particular to a method for manufacturing a three-dimensional object. Background technique [0002] Additive Manufacturing (AM for short), also known as 3D printing, is an advanced manufacturing technology with distinctive features such as digital manufacturing, high flexibility and adaptability, direct CAD model drive, fast speed, and rich and diverse material types. Since its development in the late 1980s, it has become a pillar technology in modern advanced manufacturing technology. Powder bed fusion technology is one of the fastest-growing additive manufacturing technologies in recent years. Its basic working principle is: it is necessary to slice the 3D model of the workpiece in the pre-processing software, obtain the printing information of each layer of the workpiece, and plan the laser scan path. During the printing process, the powder feeding device sends a c...

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, the simultaneous scanning of multiple lasers and multiple galvanometers is generally used to improve processing efficiency. However, this solution is expensive to implement, technically difficult, and the splicing effect is poor, and the efficiency improvement is limited.

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